Value Collection KEPFI0370-100BX K-lock Hex Nut 3/8-24

Product Description

The VALUE COLLECTION KEPFI0370-100BX is a steel K-Lock hex nut with an integrated external tooth lock washer, designed to provide positive thread locking and vibration resistance in a single fastener assembly. The nut features a 3/8-24 UNF thread and a zinc plating finish for corrosion protection in general-purpose applications. The external tooth lock washer bites into the mating surface under torque, resisting loosening from vibration or dynamic loads. This fastener is installed by electricians, HVAC technicians, plumbers, and general tradespeople wherever a reliable, compact locking solution is needed without a separate loose washer.

This K-Lock nut is suited for residential and light commercial mechanical, electrical, and HVAC applications where fine-thread fastening is required. The 3/8-24 UNF thread is common in equipment panels, brackets, conduit fittings, and mechanical assemblies that call for a fine-thread hex nut with an integrated locking feature. The 57/64-inch washer diameter and 9/16-inch width across flats are standard for this thread size and are compatible with common hex driver and wrench tooling. This item is sold as a box of 100 pieces.

Key Features

• Integrated external tooth lock washer eliminates the need for a separate loose washer
• 3/8-24 UNF fine thread for precise thread engagement in equipment and panel applications
• Zinc plated steel construction provides corrosion resistance for general indoor and protected environments
• 57/64-inch washer diameter and 9/16-inch width across flats for standard hex tooling compatibility
• Box quantity of 100 pieces supports bulk fastener stocking for service vans and shop inventory

Compatibility

Designed as a standard 3/8-24 UNF K-Lock hex nut for use in general mechanical, electrical, and HVAC assemblies requiring a fine-thread hex nut with an integrated external tooth lock washer.

Installation Notes

Installation requires a standard 9/16-inch hex wrench or socket driver. De-energize all electrical circuits and depressurize or shut off relevant systems before servicing any assembly that uses these fasteners. The external tooth washer requires a clean, flat mating surface to seat and lock properly. Do not reuse K-Lock nuts that have been fully torqued, as the lock washer teeth may be deformed.